Parts for your 2006 Toyota Prius-Rack boots

Rack boots on a 2006 Toyota Prius: fitted, and worth looking after

Per Toyota’s factory Repair Manual for the NHW20 Prius (Steering – Linkage and Gear) and the Toyota Electronic Parts Catalog for 2004–2009 models, the 2006 Prius is built with steering rack boots (also called bellows) on both sides of the rack-and-pinion. Major aftermarket catalogues for this model list rack-and-pinion bellows kits as well, which confirms they’re definitely fitted and serviceable items on this vehicle.

The rack boots on a 2006 Toyota Prius do a simple but critical job: they seal and protect the inner tie rod joints and the rack bar from road grit, water, and dust while allowing the steering to move freely. Even though this Prius uses electric power steering (EPS) rather than a hydraulic system, the rack still needs flexible bellows to keep contaminants out and the correct grease in. When a boot splits, water and dirt sneak in, grease gets pushed out, and corrosion or accelerated wear can start chewing through the rack and inner tie rods. Left too long, that can turn a cheap boot replacement into a full steering rack job.

As part of normal servicing, it’s smart to eyeball both boots every 10,000–15,000 kilometres or at each oil change. Signs to look for include cracks, splits, loose or missing clamps, grease flung onto nearby components, or a damp, gritty feel around the inner tie rod. If one boot is torn, replacing both sides is good practice. Use quality clamps rather than generic cable ties, proper tension keeps the boot sealed and breathing as designed.

When fitting new boots, keep the rack centred, match the original clamp locations, and don’t overpack with the wrong grease. The inner joint uses specific steering grease, and excess can cause boot ballooning. Many racks equalise air between the two boots, so be sure any breather path isn’t blocked. If an inner tie rod must be removed to slide the boot on, measure the exposed thread or count turns so the toe is close, then book a wheel alignment straight after. A careful DIYer with the right tools can handle boots, but if there’s any play in the inner tie rods, or corrosion on the rack bar, it’s time for a pro to assess it. Keeping these bellows tidy helps the Prius steer quietly, track straight, and sail through WOF/RWC checks in Aus and NZ.

Do 2006 Prius models really have rack boots, and what are the tell-tale wear signs?

Yes, the NHW20 (2004–2009) Prius uses a rack-and-pinion with bellows boots on both sides. Common wear signs include visible splits or perishing, greasy fling on the subframe, loose clamps, or a gritty feel around the inner tie rod. Any clunking over bumps or vague steering can hint at inner tie rod wear that often starts with a failed boot.

Because these boots keep dirt and water away from the rack bar and inner joints, catching a split early saves the steering gear from costly damage.

Will torn rack boots fail a WOF or RWC in New Zealand or Australia?

Often, yes. Inspectors don’t like split or unsecured steering dust boots because they expose safety‑critical parts to contamination. A torn boot can trigger a fail or a defect notice, with a recheck required after repair.

Replace the boots promptly and make sure clamps are snug and correctly placed. It’s a quick fix compared with the price of a worn rack.

Is a wheel alignment needed after replacing rack boots on a 2006 Prius?

If the inner or outer tie rod was disturbed to slide the boot on, plan on a wheel alignment. Counting turns or measuring the tie rod length will get it close, but only an alignment sets toe precisely and prevents uneven tyre wear.

If the boots were swapped without touching the tie rods, an alignment may not be necessary, but it’s still wise to check steering feel and tyre wear.